fix(node): handle resolving ".//<something>" in npm packages (#26920)

The issue was this package had an import like: `".//index.js"` and we
resolved that as specified, but node normalizes it to `"./index.js"` so
we have to copy node.

cli/module_loader.rs

@@ -474,21 +474,6 @@ impl<TGraphContainer: ModuleGraphContainer>
     raw_specifier: &str,
     referrer: &ModuleSpecifier,
   ) -> Result<ModuleSpecifier, AnyError> {
-    if self.shared.in_npm_pkg_checker.in_npm_package(referrer) {
-      return Ok(
-        self
-          .shared
-          .node_resolver
-          .resolve(
-            raw_specifier,
-            referrer,
-            self.shared.cjs_tracker.get_referrer_kind(referrer),
-            NodeResolutionMode::Execution,
-          )?
-          .into_url(),
-      );
-    }
-
     let graph = self.graph_container.graph();
     let resolution = match graph.get(referrer) {
       Some(Module::Js(module)) => module

resolvers/node/resolution.rs

@@ -202,7 +202,7 @@ impl<TEnv: NodeResolverEnv> NodeResolver<TEnv> {
     mode: NodeResolutionMode,
   ) -> Result<Url, NodeResolveError> {
     if should_be_treated_as_relative_or_absolute_path(specifier) {
-      Ok(referrer.join(specifier).map_err(|err| {
+      Ok(node_join_url(referrer, specifier).map_err(|err| {
         NodeResolveRelativeJoinError {
           path: specifier.to_string(),
           base: referrer.clone(),
@@ -1763,6 +1763,17 @@ fn get_module_name_from_builtin_node_module_specifier(
   Some(specifier)
 }
 
+/// Node is more lenient joining paths than the url crate is,
+/// so this function handles that.
+fn node_join_url(url: &Url, path: &str) -> Result<Url, url::ParseError> {
+  if let Some(suffix) = path.strip_prefix(".//") {
+    // specifier had two leading slashes
+    url.join(&format!("./{}", suffix))
+  } else {
+    url.join(path)
+  }
+}
+
 #[cfg(test)]
 mod tests {
   use serde_json::json;

tests/registry/npm/@denotest/specifier-two-slashes/1.0.0/index.js

@@ -0,0 +1,2 @@
+// node.js will resolve this as ./other.js
+export * from ".//other.js";

tests/registry/npm/@denotest/specifier-two-slashes/1.0.0/other.js

@@ -0,0 +1,3 @@
+export function add(a, b) {
+  return a + b;
+}

tests/registry/npm/@denotest/specifier-two-slashes/1.0.0/package.json

@@ -0,0 +1,6 @@
+{
+  "name": "@denotest/specifier-two-slashes",
+  "version": "1.0.0",
+  "type": "module",
+  "main": "index.js"
+}

tests/specs/npm/specifier_two_slashes/__test__.jsonc

@@ -0,0 +1,4 @@
+{
+  "args": "run --quiet main.ts",
+  "output": "3\n"
+}

tests/specs/npm/specifier_two_slashes/main.ts

@@ -0,0 +1,3 @@
+import { add } from "npm:@denotest/specifier-two-slashes";
+
+console.log(add(1, 2));